Results 11 to 20 of about 55,056 (232)

Copper (II) Ions Induced Self-Disproportionation of Enantiomers in Capillary Electrophoresis for the Quantification of Atenolol Enantiomers

open access: yesMolecules, 2023
Despite the fact that the self-disproportionation of enantiomers (SDE) has been found for several decades and has been widely used in crystallization, sublimation and chromatography for the purification or separation of nonracemic compounds, the ...
Shaoqiang Hu
doaj   +2 more sources

The separation of specific enantiomers of anticancer reagent cytarabine using HPLC. [PDF]

open access: yes
During the research and development stage of any drug candidate, there is a growing need to investigate the properties of existing enantiomers, if the drug possesses chirality.
Kamble, Shweta Ashok
core   +6 more sources

Application of Natural and Modified Biomacromolecules in Miniaturised Separative Analytical Techniques [PDF]

open access: yes
In pharmaceutical R & D, drug stereochemistry, and consequently the rotation of enantiomers, is very important. Because they act as chiral selectors in vivo, biomacromolecules have been extensively used as chiral selectors for the liquid chromatographic (
Salmon, Andrew B
core   +6 more sources

MODULATION OF CALCIUM CHANNELS IN ARTERIAL SMOOTH-MUSCLE CELLS BY DIHYDROPYRIDINE ENANTIOMERS [PDF]

open access: yes, 1993
The actions of the optical enantiomers of BAY K 8644 and Sandoz 202,791 were studied on barium inward currents recorded using the whole-cell configuration of the patch clamp technique from enzymatically isolated smooth muscle cells from the rabbit ear ...
S Hering   +7 more
core   +1 more source

High proline content of bacteria-sized particles in the western North Pacific and its potential as a new biogeochemical indicator of organic matter diagenesis

open access: yesFrontiers in Marine Science, 2015
Amino acid (AA) compositions were determined for bacteria-sized particles and particulate organic matter (POM) collected in offshore regions of the western North Pacific.
Hiroyuki eTakasu, Toshi eNagata
doaj   +1 more source

Enantioselective effects of the fungicide metconazole on photosynthetic activity in Microcystis flos-aquae

open access: yesEcotoxicology and Environmental Safety, 2021
Enantiomers of chiral fungicides usually display different toxic effects on nontarget organisms in the surrounding environment, although there are rare reports on the enantioselective toxicity of metconazole (MEZ) to aquatic organisms, such as ...
Ling Li, Peiling Huang, Junjie Li
doaj   +1 more source

Characterization of the conglomerate form of acetyl-dl-leucine by thermal analysis and solubility measurements [PDF]

open access: yes, 2012
Starting from a mixture of enantiomers in solution, crystallization can generate different types of crystals. In order to determine which type of crystal is obtained in the case of acetylleucine, an active pharmaceutical ingredient (API), analytical ...
B. Biscans   +9 more
core   +1 more source

On the Separation of Enantiomers by Drift Tube Ion Mobility Spectrometry [PDF]

open access: yes, 2022
Racemic mixtures of twelve common α-amino acids and three chiral drugs were tested for the separation of their enantiomers by drift tube ion mobility spectrometry (IMS)-quadrupole mass spectrometry (QMS) by introducing chiral selectors into the buffer ...
Markus, Doerr   +1 more
core   +1 more source

Pharmacokinetic study of praziquantel enantiomers and its main metabolite R-trans-4-OH-PZQ in plasma, blood and dried blood spots in Opisthorchis viverrini-infected patients [PDF]

open access: yes, 2016
Praziquantel (PZQ) is the treatment of choice for infections with the liver fluke Opisthorchis viverrini, a major health problem in Southeast Asia. However, pharmacokinetic (PK) studies investigating the disposition of PZQ enantiomers (R- and S-PZQ) and ...
Jennifer Keiser   +15 more
core   +2 more sources

Separation of Enantiomers through Local Vorticity: A Screw Model Mechanism [PDF]

open access: yes, 2021
We present a model to explain the mechanism behind enantiomeric separation under either shear flow or local rotational motion in a fluid. Local vorticity of the fluid imparts molecular rotation that couples to translational motion, sending enantiomers in
J. Daniel, Gezelter, Anderson, Duraes
core   +2 more sources

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